From 476eabbf6e00bd70249106f8fef342417589a902 Mon Sep 17 00:00:00 2001
From: Ivan Kardykov <kardykov@tabit.pro>
Date: Tue, 14 Dec 2021 11:04:05 +0300
Subject: [PATCH] Add usbip tweak clear halt patch

Some USB 3.0+ storage devices freeze with usb_clear_halt(), but it is
enough to reset endpoint.

This requires to fix QubesOS/qubes-issues#7118 and could be useful with other
devices.
---
 ...p-tweak-clear-halt-with-simple-reset.patch | 61 +++++++++++++++++++
 kernel.spec.in                                |  1 +
 2 files changed, 62 insertions(+)
 create mode 100644 0001-usbip-tweak-clear-halt-with-simple-reset.patch

diff --git a/0001-usbip-tweak-clear-halt-with-simple-reset.patch b/0001-usbip-tweak-clear-halt-with-simple-reset.patch
new file mode 100644
index 00000000..4179851f
--- /dev/null
+++ b/0001-usbip-tweak-clear-halt-with-simple-reset.patch
@@ -0,0 +1,61 @@
+From 29034eb7621ace3416c6964c32227c5aa0dd005b Mon Sep 17 00:00:00 2001
+From: Ivan Kardykov <kardykov@tabit.pro>
+Date: Tue, 14 Dec 2021 10:53:50 +0300
+Subject: [PATCH] usbip: tweak clear halt with simple reset
+
+Some USB 3.0+ storage devices freeze with usb_clear_halt, but it is
+enough to reset endpoint here.
+
+Signed-off-by: Ivan Kardykov <kardykov@tabit.pro>
+---
+ drivers/usb/usbip/stub_rx.c | 25 ++++++++++---------------
+ 1 file changed, 10 insertions(+), 15 deletions(-)
+
+diff --git a/drivers/usb/usbip/stub_rx.c b/drivers/usb/usbip/stub_rx.c
+index 325c22008..7caa07bbb 100644
+--- a/drivers/usb/usbip/stub_rx.c
++++ b/drivers/usb/usbip/stub_rx.c
+@@ -67,8 +67,6 @@ static int tweak_clear_halt_cmd(struct urb *urb)
+ 	struct usb_ctrlrequest *req;
+ 	int target_endp;
+ 	int target_dir;
+-	int target_pipe;
+-	int ret;
+ 
+ 	req = (struct usb_ctrlrequest *) urb->setup_packet;
+ 
+@@ -83,21 +81,18 @@ static int tweak_clear_halt_cmd(struct urb *urb)
+ 	target_dir = le16_to_cpu(req->wIndex) & 0x0080;
+ 
+ 	if (target_dir)
+-		target_pipe = usb_rcvctrlpipe(urb->dev, target_endp);
+-	else
+-		target_pipe = usb_sndctrlpipe(urb->dev, target_endp);
++		target_endp |= USB_DIR_IN;
+ 
+-	ret = usb_clear_halt(urb->dev, target_pipe);
+-	if (ret < 0)
+-		dev_err(&urb->dev->dev,
+-			"usb_clear_halt error: devnum %d endp %d ret %d\n",
+-			urb->dev->devnum, target_endp, ret);
+-	else
+-		dev_info(&urb->dev->dev,
+-			 "usb_clear_halt done: devnum %d endp %d\n",
+-			 urb->dev->devnum, target_endp);
++	/*
++	 * Some USB storage devices freeze with usb_clear_halt()
++	 * so just reset endpoint here.
++	 */
++	usb_reset_endpoint(urb->dev, target_endp);
+ 
+-	return ret;
++	dev_info(&urb->dev->dev,
++		"usb_reset_endpoint done: devnum %d endp %d\n",
++		urb->dev->devnum, target_endp);
++	return 0;
+ }
+ 
+ static int tweak_set_interface_cmd(struct urb *urb)
+-- 
+2.31.1
+
diff --git a/kernel.spec.in b/kernel.spec.in
index c20c1ce3..756cb630 100644
--- a/kernel.spec.in
+++ b/kernel.spec.in
@@ -126,6 +126,7 @@ Patch5: 0006-block-add-no_part_scan-module-parameter.patch
 Patch12: 0013-xen-pcifront-pciback-Update-pciif.h-with-err-and-res.patch
 Patch14: 0001-Revert-xen-netback-Check-for-hotplug-status-existenc.patch
 Patch15: 0002-Revert-xen-netback-remove-hotplug-status-once-it-has.patch
+Patch16: 0001-usbip-tweak-clear-halt-with-simple-reset.patch
 
 %description
 Qubes Dom0 kernel.